In the dead of night pre-orders happen. RIM has snuck out the first official pricing for its 7-inch BlackBerry PlayBook tablet and, true to its promise, it costs less than $500. A cent less than $500. The 16GB WiFi-only PlayBook is now up for pre-order at Best Buy and is coming to a vast list of other retailers soon. Staples, Office Depot and RadioShack are among the popular US store chains, while AT&T, Sprint and Verizon will also carry the tablet. No T-Mobile on that list. Canadian pre-orders for the same model are now live as well, also at $499.99, alb
